Home / 389,621.80-584,432.70-212,474.80

Finding the Fourth Proportional to 389,621.80, 584,432.70 and 212,474.80

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Solution

The fourth proportional to 389,621.80, 584,432.70 and 212,474.80 is: 318,712.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,621.80 : 584,432.70 = 212,474.80 : x
  2. Step 2: Convert to fraction form
    389,621.80/584,432.70 = 212,474.80/x
  3. Step 3: Cross multiply
    389,621.80x = 584,432.70 × 212,474.80
  4. Step 4: Simplify right side
    389,621.80x = 124,177,221,045.96
  5. Step 5: Solve for x
    x = 124,177,221,045.96/389,621.80
  6. Step 6: Final answer
    x = 318,712.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.